Single-sided Service Prefabricated Chambers of the KSO 3 series

The chambers are intended for installation in closed electrical rooms. Climatic version type – UHL according to GOST 15150. The diagrams of the main circuits of the KSO chambers are given in Appendices A, B and C. The overall dimensions of the KSO chambers are given in Appendix G. The list of KSO chamber types is given in Appendix D. The list of devices and equipment required for monitoring and testing of KSO chambers is given in Appendix E. The list of documents referenced in these technical conditions is given in Appendix G.

The structure of the conventional designation of the type of KSO chambers using the example of an input chamber according to the main circuit diagram 5 with a VPMP-10 switch and a PPO-10 drive for a rated current of 600 A has the following form:

KSO-285-5PV-600 UHL3.1, where KSO is a one-way service assembly chamber; 285 is a modification of the chamber (285 – 1985, 292 – 1992, 298 – 1998, 366 – 1966, 386 – 1986, 393 – 1993);

5 – serial number of the main circuit diagram; PV – circuit breaker type (PV – VPMP-10 circuit breaker with PPO-10 drive; E – VPM-10 circuit breaker with PE-11 drive); 600 – rated current of the chamber (400, 600 or 1000 A); UHL3.1 – climatic version and placement category. By special order, KSO chambers can be manufactured for a lower ambient air temperature of down to minus 45° C, while the order form must be as follows: "KSO-285-5PV-600 UHL3.1, TU 3434-006-971054348-2009, minus 45° C". General requirements – KSO chambers must comply with GOST 14693, the requirements of these technical conditions and a set of design documentation, approved in the established manner.

Nominal values of climatic factors are UHL3.1 according to GOST 15150 and GOST 15543, with the lower value of ambient air temperature being minus 10° C (for KSO chambers without meter heating installation) and minus 45° C (for KSO chambers with meter heating installation). The altitude above sea level is no more than 1000 m.

The environment is non-explosive and does not contain conductive dust, aggressive vapors and gases in concentrations that destroy metal and insulation.

The degree of protection according to GOST 14254 is IP20 for the outer shells of the facade and the sides of the chambers and IP0 0 for the rest of the KSO chambers.

The group of operating conditions in terms of exposure to mechanical factors of the external environment is M1 according to GOST 17516.1.

The operating mode of the KSO chambers is continuous.

The working position of the cameras in space is vertical, the permissible deviation from the vertical is no more than 5 degrees.

The busbar system is single-row with non-insulated busbars.

The electrical strength of the insulation of the main and auxiliary circuits of the KSO chambers must comply with the requirements of GOST 1516.1.

KSO chambers must meet the requirements of GOST 8024 with regard to heating under long-term load with rated current.

When exposed to short-circuit currents, the heating temperature of the current-carrying parts of the chamber (main circuit diagrams) must not exceed the maximum permissible values specified in the table:

The heating temperature of the current-carrying parts of the KSO chambers, which may be touched during operation, must not exceed 50° C.

KSO chambers must have sufficient mechanical strength to ensure normal operating and transportation conditions without deformation or damage that would interfere with their normal operation.